thanks i can use a 76/ 83/83/86 90 which would be better and pinion gears what size . i have tryed my mamba castle it will not mesh up at all. but with the traxxas vxl esc and 4600kv = 8.5 turn its fine with vxl esc but the mamba feel like its draging a bit but not smooth on the gears

On my X6 I run 78 Spur and 23 pinion with a 6.5 brushless motor.
Loosen the slipper to calm down the wheelies !!

hi mate can you help me out with the gearing ect plz